“What are you doing here?” Greg asked.

“This is where I’m staying,” Lemon Brown said. “What you here for?”

“Told you it was raining out,” Greg said, leaning against the back of the couch until he felt it give slightly.

“Ain’t you got no home?”

“I got a home,” Greg answered.

“You ain’t one of them bad boys looking for my treasure, is you?” Lemon Brown cocked his head to one side and squinted one eye. “Because I told you I got me a razor.”

“I’m not looking for your treasure,” Greg answered, smiling. “If you have one.”

“What you mean, if I have one,” Lemon Brown said. “Every man got a treasure. You don’t know that, you must be a fool!”

—“The Treasure of Lemon Brown,”
Walter Dean Myers

How does the dialogue in this passage move the story forward?

It suggests that Greg and Lemon Brown have a lot in common.
It explains why Greg is inside the house.
It introduces Lemon Brown’s treasure.
It shows details about the New York setting.